Beta version of new Xplane interface is available here: http://www.hidmacros.eu/luamacros_xpl11.zip
The interface was completely rewritten to be faster (reading of variables) and it's XPL 11 compatible.
I haven't tested it yet much, please report any issues here.
To upgrade your current LuaMacros installation it's enough to replace exe file and XPL plugin.

New version uploaded (same link) with fixed WinHook.dll which is also needed to update.
Without this fix original key strokes were reaching active application even if triggerring macro.
So the latest version is 0.1.0.338